My Oracle Support Banner

Autoupgrade - Step-by-step upgrade from non-CDB to Oracle Database 21c (Doc ID 2994195.1)

Last updated on JANUARY 08, 2024

Applies to:

Oracle Database - Enterprise Edition - Version and later
Information in this document applies to any platform.


 Describe step-by-step process of upgrading a non-CDB database to Oracle Database 21c with Autoupgrade tool.

The non-CDB to PDB feature of the AutoUpgrade utility provides you flexible options to control how you upgrade your earlier release non-CDB Oracle Database when you upgrade and convert to the multitenant architecture.

All upgrades to Oracle Database 21c must use the multitenant architecture. Use of the non-CDB Oracle Database architecture is desupported in this version. When you migrate your database from the non-CDB architecture to PDBs, you obtain up to three user-configurable PDBs in a container database (CDB), without requiring a multitenant license. If you choose to configure four or more PDBs, then a multitenant license is required. 


 - The source database must be a version compatible with the direct upgrade to 21c. ( 19c, 18c, 12.2 ).

 - The target CDB must be created before of performing the upgrade with AutoUpgrade.

 - The source non-CDB Oracle Database release and operating system platform must be supported for direct upgrade to the target CDB release.

 - Source and Target ORACLE_HOMEs must have the latest level of RU Patches.



To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!

In this Document

My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.